Failure to recognize that many laboratory animals live unhealthy lives may be leading researchers to misinterpret their findings, according to Nature News. Writing in PNAS, researchers at the National Institute on Aging discuss that many laboratory mice and rats are metabolically morbid, and, consequently, will die sooner than animals of normal weight.

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Technology Review reports that researchers in the US have used CRISPR to modify a number of human embryos.

By introducing genes from butterfly peas and Canterbury bells, researchers in Japan have developed a blue chrysanthemum, according to NPR.

Plant researchers plan to sequence some 10,000 samples that represent the major plant clades, ScienceInsider reports.

In Nature this week: a Danish reference genome, and more.